package test;

class X{
	Y y=new Y();//1
	public X(){//2
		System.out.print("X");
	}
}
class Y{
	public Y(){//3
		System.out.print("Y");
	}
}
public class Z extends X{
	Y y=new Y();//4
	public Z(){//5
		System.out.print("Z");
	}
	public static void main(String[] args) {
		new Z();
	}
}